I was cleaning out my chickens' bedding and a cockroach crawled out from under it and scuttled away. My heart sort of skipped a beat and I ran inside. I sprayed all around the inside of the coop with poultry spray and put new bedding on top. I havn't seen any in the coop since then but I just opened the door to my shed and 2 roaches nearly fell on my head! I really don't want them going into my house and I don't know how to stop them. What should I do to keep them out?